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through adjacent fire hydrants in any part of the ship from nozzles of sizes specified in regulation 34 the following minimum pressure shall be capable of being maintained at any hydrant-
(a) in any passenger steamer-
(i) of 4,000 tons and upwards, 45 pounds per square inch; or
(i) of 1,000 tons and upwards but under 4,000 tons. 40 pounds per square inch; or
(i) of under 1,000 tons, 30 pounds per square inch; and
(b) in any ship other than a passenger steamer-
(1) of 6,000 tons and upwards. 40 pounds per square inch; or
(ii) of 1,000 tons and upwards but under 6,000 tons, 37 pounds per square inch; or
(ii) of under 1000 tons, 30 pounds per square inch. (3) Where any ship is required by these regulations to pro- vide two jets of water under the conditions required by these regulations, hydrants sufficient in number shall be so positioned as to enable at least two jets of water not emanating from the same hydrant, one of which shall be from a single length of hose, to reach any part of the ship normally accessible to the passengers or crew while the ship is being navigated, and to any store room and any part of any cargo space when empty.
(4) Where any ship is required by these regulations to pro- vide one jet of water under the conditions required by these regulations, hydrants sufficient in number shall be so positioned as to enable one jet of water from a single length of hose to reach any part of the ship normally accessible to the passengers or crew while the ship is being navigated, and uny store room and any part of any cargo space when empty.
(5) In order to comply with this regulation-
(a) the fire main shall have no connexions other than those
necessary for fire fighting and washing down;
(b) materials readily rendered ineffective by heat shall not be used for fire mains unless adequately protected:
(c) the pipes and fire hydrants shall be so placed that the
fire hoses may be easily coupled to them;
(d) in ships which may carry deck cargo the fire hydrants shall be so placed that they are always readily accessible and the pipes shall be arranged as far as practicable to avoid risk of damage by such cargo;
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(e) unless there is provided one fire hose and nozzle for each fire hydrant in the ship there shall be complete interchangeability of fire bose couplings and nozzles:
() valves of the screw lift type or cocks shall be fitted in such positions on the pipes that any of the fire hoses may be removed while the fire pumps are at work: (g) the water pipes shall not be made of cast iron, and il
made of iron or steel shall be galvanized; and
(A) where wash deck lines are not self-draining suitable
drain cocks shall be fitted to avoid damage by frost.
34. (1) Fire hoses provided in compliance with these regula. tions shall not exceed 60 feet in length except that in ships having a moulded breadth of 90 feet or more the length of the fire hoses for exterior locations and for cargo spaces shall not exceed 90 feet in length,
(2) Such hoses shall be made of closely woven flax canvas or other suitable material and shall be provided with couplings. branch-pipes and other necessary fittings, and with a plain nozzle in addition to any spray nozzle required by these regulations.
(3) Every are hose provided in compliance with these regula- tions, together with the tools and fittings necessary for its use, shall be kept in a conspicuous position near the hydrants or con- nexions with which it is intended to be used.
(4) Except in partially decked ships of Group 5 and in ships of Class X and XII, fire boses provided in compliance with these regulations shall not be used for any purpose other than extinguish- ing fire or lesting with fire appliances.
(5) Every ship which is required by these regulations to be provided with fire pumps operated by power shall be provided with nozzles of inch, † inch or 2 inch in diameter or as near thereto in diameter as possible.
(6) Nozzles larger in diameter may be provided if the require- ments of these regulations relating to the provision of water for fire fighting purposes are otherwise complied with.
(7) For machinery spaces and exterior locations the diameter of the nozzles shall be such as to obtain the maximum possible discharge from the minimum number of jets of water and at the pressure required by these regulations from the smallest fire pump permitted by paragraph (5) of regulation 32:
Provided that the diameter of the nozzles shall not be required to be greater than inch.
Fire hoses, nozzles, elc.